Steam-boiler clean-out device



M. HUFFMAN. STEAM olLER CLEAN ouT DEVICE.

APPIICATION FILED SEPT 23. 15H9- Patented May 16, 1922.

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STEANLBOLER CLEAN-0IT i BEVCE Laisser.

Specification of Letters Patent.

.rau-interi aia-'y is. rss2.

`Application led September 23, 191e. *Seriali'ra 325,793.'

for a new and useful sediment-remover for.

steam-boilers,r which included in its construction a tube or pipe to be permanently inserted in a steam boiler near the bottom thereof7 and which was provided with an outlet exterior to the boiler, which outlet was controlled by a valve. The tube was provided with a series of openings capable oi bein g successively uncovered so that whenj the valve was opened and these openings successivelyy uncovered, the steam pressure' within the boiler would exhaust through the valve and carry with it the sediment and scale in the bottom o the boilerY adjacent to the uncovered,opening, thus effectingA a cleaning oi the boiler. Y y n f My present invention consists in the nature ot an improvement upon the type of boiler cleaner disclosed in my said patent. In my present invention, instead of a series ot oiienings I have provided continuous slots in both the stationary and rotatable tubes within the boiler, one of which is spirally arranged so that during the rotation ot one of the tubes the straight slot and the spiral slot willregisteror coincide at progressively advancing points, so that the water can blow oli? through ther slots throughout the entire length ot the boiler.

More specifically it is myV object to provvide means whereby the rotation of the movable tube is made automatic and capable of operation by the pressure of the out going water, so thatl the water blows od through the tubes progressively from one end of the boiler to the other in arapid manner, producing considerable agitation withinthe boiler to stir upv and reinoveV sediment moreperfectly than 'was possible with the construction described 1n niy-said patent.

A further object is to provide means for automatically cleaning` the registering slots in the tubes to prevent them from being clogged by sediment or scale.

invention consists in the construction, arrangement and combination-ot the various parts oi the levice. whereby the objects contemplated anx attaiiu-id. as hereinafter more claimsD and'illust te lin the/accompanying drawings. in which: i `U 'jolly set vlforth7 pointed out in my Figure l shows a central,llongitudinal, f

vertical; sectional view oit a device embodying my inventionwhen applied to a portion ot a steam boiler. y j

vFignu'e 2 shows an inverted plan view ot the stationary andl rotatable blow-oit tubes. showing by dotted lines the position oil the spiral slot. i

Figure 3 shows a detail view of the automatic slot. cleaning device, with the-adjacent portions or they tubos through which it is passed, illustrated in section. l

Figure shows a sectionalzview on the line ot iligure; and l i Figure 5 shows a sectional View onthe line 5 5 oi' `Figure l.

Referring tothe izccompiniying` drawings'. i have used the reference numeral l0 to in# dicate `that portionot the steam boiler illustrated in the drawings.

liiy improved cleaning device may be used in the nature otan attachment to be applied tosteain boilers. or it may be furnished with new steam boilers.. as desired.

in. one end ot the boiler i formv an opening through which the clean-out tubes may ybe inserted, and adiacent" to this opening is a detachable screw-threaded cover plate 1l which may be secured by bolts l2 to the boiler. The outer orf stationary cleano'ut tube is indicated by the numeral i3, and is proi-idedwith acap at one end to close the end. and its lother end screwed to the plate ll., thus supporting itin position within the boiler. rihis tube is provided. as clearly shown in iiigure 2. with a vlongitudinally arranged slot .Min its under side. On the end of this vtube that projects beyond the boiler l have providedA a stui'iing box loto prevent leakage. n l

iotatably` mounted within the outer tube 13 lis the inner tube4 16, provided with 'a spirally arranged slot l?. is capable ot tree rotation within the, sta` tionary outer tube,` and is introduced at its end outside of the boiler into a valve 18, there being a stutling box 19 connecting the r@his inner tube valve with the said inner tube to prevent leakage and to permit the inner tube to freely rotate within the valve.

For the purpose oli automatically rotating the inner tube l have provided on the interior thereof a spiral blade 2O fixed in position by frictional contact caused by forcing the said spiral member longitudinally in the said tube and so arranged that when water enters the interior oit the tube 16 through its slot, this water will travel rapidly through the tube 16 and thel valve 18the said blade 20 will cause the inner tube to rotate due to boiler pressure. Obviously, during this rotation the spiral slot 17 and the straight slot 1li will come into coinciding` or registering positions progressively throughout the length of the tubes, so that at times the water from the interior of the boiler will pass through the registering slots at one end and then progressively through the tubes at the points where the slots coin# cide or register, until the other ends of the tubes are reached, so-that when it is desired to clean out a boiler it is only necessary `for the operator to open the valve 18, whereupon the steam pressure in the interior of the boiler willbear upon the yspiral blade 20 and cause it to turn and carry with it the inner tube.

ln .the event that, :tor any reason, the inner tube should fail to start properly, I have provided a handle 20 detachably secured to the inner tube by the set screw 22, which handle may be turned until the inner tube is capable oit free movement, whereupon the movement will be continued by the action ofthe water upon the spiral blade.

l have also provided means for automatieally cleaning the slots which sometimes become clogged by sediment or scale. For this purpose l have provided a tube 23 having` flanged ends 24e and a roller 25 surrounding the tube 23 between the heads 24. This 'tube and its roller are extended through thev slots 1a and 1i' at the point where they register or coincide, and obviously, as the inner tube is frotated, and the blow-out roller, the tube 23 will be moved longitudinally of the tubes 223 and 16, and during this movement any sediment or scale that may have become lodged in the slots will be removed, while the water will enter the tube 16 through the opening ot the tube 23, as the said tube 23 is moved longitudinally in the slots 14 and 17.

I claim as my invention:

1. ln a device or the class described, the combination ot an outer stationary tube and an inner rotatable tube, said tubes being provided with openings that are capable or' registering or coinciding at different parts of the tubes during the time that the inner tube is rotated, and means connected to the said inner tube, to be acted on by the water escaping through the said inner tube, for causing said inner tube to rotate.

2. In a device of the class described, the combination of an outer stationary tube and an inner rotatable tube, said tubes being provided with openings that are capable oit registering or coinciding at dirlerent parts ol the tubes during the time that the innerl tube is rotated,fmeans connected to the said inner tube, to be acted on by the water escaping through it, for causing` said inner tube to rotate, and a shut-oli' valve applied kto the end of the inner tube projected beyond the boiler, whereby upon the opening or said valife the action 01"' the escaping vwater through said valve and inner tube will cause the inner tube to automatically rotate.

ln a device of the class described, the combination of an outel` stationary tube and an inner rotatable tube, said ktubes being provided with openings that are capable of registering or coinciding at diderent parts oi the tubes during the time that the inner tube is rotated, means connected to the said inner tube, ,to be acted on by the water escapl ing through it, fol1 causing said inner tube to rotate, a shut-off valve applied to the end of the inner tube projected beyond the boiler, whereby upon the opening of said valve the action oi the escaping Water through said valve and inner tube will cause the inner tube to automatically rotate, and a lever applied to the rotatable inner tube, whereby it may be manually turned.

a. In a device of thecharacter described, the combination oi an inner and an outer tube, one oi which is rotatable relative to the other, said tubes being provided, one with a straight slot and the other with a spiral slot, and a movable cleaning device inserted through the registering slots of said tubes, and capable of being advanced longitui dinally o1"- the tubes when the rotatable tube is turned.

the combination of an inner and an outer tube, one of which is rotatable relative to the other, said tubes being provided. one with a straight slot and the other with a spiral slot, and a movable cleaning device inserted through the registering slots of said tubes, and capable of being advanced longitudinally of the tubes when the rotatable tube is turned, said device comprising a headed tube passed through the said tubes, and a roller on said headed tube, between the heads thereof, and designed to engage the edges of the slots of the iirst mentioned tubes, for the purposes stated.

Des Moines, iowa, July 3, 1919.

Minn norm/IAN. 

